Make iostream #inclusion explicit

llvm-svn: 25514
diff --git a/llvm/lib/Transforms/Scalar/ADCE.cpp b/llvm/lib/Transforms/Scalar/ADCE.cpp
index 488f494..4452b40 100644
--- a/llvm/lib/Transforms/Scalar/ADCE.cpp
+++ b/llvm/lib/Transforms/Scalar/ADCE.cpp
@@ -27,6 +27,7 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/STLExtras.h"
 #include <algorithm>
+#include <iostream>
 using namespace llvm;
 
 static IncludeFile X((void*)createUnifyFunctionExitNodesPass);